Glumes. Glumes relatively large, unequal to more or less equal, shorter than spikelet to about equal to spikelet, shorter than adjacent lemmas or long relative to adjacent lemmas (from about half to as long as), pointed, awned to awnless, keeled, similar (membranous, somewhat curved, often asymmetric about the midvein). Lower glume 1–3 nerved. Upper glume 3 nerved.